Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 37% on the overall cost on flights from Portland to Bristol.
When flying from Portland to Bristol, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 3% versus a flight in the morning.